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Collapse and Revival of an Artificial Atom Coupled to a Structured Photonic Reservoir

Ferreira, Vinicius S. and Banker, Jash and Sipahigil, Alp and Matheny, Matthew H. and Keller, Andrew J. and Kim, Eunjong and Mirhosseini, Mohammad and Painter, Oskar (2020) Collapse and Revival of an Artificial Atom Coupled to a Structured Photonic Reservoir. . (Unpublished)

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A structured electromagnetic reservoir can result in novel dynamics of quantum emitters. In particular, the reservoir can be tailored to have a memory of past interactions with emitters, in contrast to memory-less Markovian dynamics of typical open systems. In this Article, we investigate the non-Markovian dynamics of a superconducting qubit strongly coupled to a superconducting slow-light waveguide reservoir. Tuning the qubit into the spectral vicinity of the passband of this waveguide, we find non-exponential energy relaxation as well as substantial changes to the qubit emission rate. Further, upon addition of a reflective boundary to one end of the waveguide, we observe revivals in the qubit population on a timescale 30 times longer than the inverse of the qubit's emission rate, corresponding to the round-trip travel time of an emitted photon. By tuning of the qubit-waveguide interaction strength, we probe a crossover between Markovian and non-Markovian qubit emission dynamics. These attributes allow for future studies of multi-qubit circuits coupled to structured reservoirs, in addition to constituting the necessary resources for generation of multiphoton highly entangled states.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Sipahigil, Alp0000-0003-1469-5272
Matheny, Matthew H.0000-0002-3488-1083
Keller, Andrew J.0000-0003-3030-1149
Painter, Oskar0000-0002-1581-9209
Additional Information:We thank Hannes Pichler for fruitful discussions regarding the mirror measurements, MIT Lincoln Laboratories for the provision of a traveling-wave parametric amplifier [60] used for both spectroscopic and timedomain measurements in this work, Jen-Hao Yeh and Ben Palmer for the use of one of their cryogenic attenuators for reducing thermal noise in the metamaterial waveguide, and Hengjiang Ren and Xueyue Zhang for help during measurements, fabrication, and writing. This work was supported by the AFOSR MURI Quantum Photonic Matter (grant 16RT0696), the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (grant PHY-1125565) with support of the Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech. V.F gratefully acknowledges support from NSF GFRP Fellowship, and M.M (A.S.) gratefully acknowledges support from a KNI (IQIM) Postdoctoral Fellowship.
Group:Kavli Nanoscience Institute, Institute for Quantum Information and Matter
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)16RT0696
Gordon and Betty Moore FoundationUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
NSF Graduate Research FellowshipUNSPECIFIED
Record Number:CaltechAUTHORS:20200409-164102679
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102473
Deposited By: Joy Painter
Deposited On:10 Apr 2020 17:54
Last Modified:04 Jun 2020 10:14

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